Good luck trying to steal a bike undetected when it has one of these on it! Move the bike and it goes off. Touch the lock and it goes off. Mysbiker lock is well built, solid, and incredibly loud. On opening, it comes with 6PCs back-up batteries, a mini wrench, lock reminder cable,3 keys, and a lock bag.
This lock is a breeze to use. Slide the cable around one of your grips or levers, slide the other end inside the mouth of the lock, align the pin on the lock with a hole on your rotor and push the lock to lock it in place! Once locked, if the lock senses vibrations it will beep three times, loudly. If it senses vibrations again before it "resets," it will let out a 110-decibel alarm that's ear-piercing for 10 seconds straight!
Only time will tell how it holds up but it's been a great product so far. Highly recommend!